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          常用的小方法
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        <h1 id="常用的小方法"><a href="#常用的小方法" class="headerlink" title="常用的小方法"></a>常用的小方法</h1><figure class="highlight js"><table><tr><td class="gutter"><pre><span class="line">1</span><br><span class="line">2</span><br><span class="line">3</span><br><span class="line">4</span><br><span class="line">5</span><br><span class="line">6</span><br><span class="line">7</span><br><span class="line">8</span><br><span class="line">9</span><br><span class="line">10</span><br><span class="line">11</span><br><span class="line">12</span><br><span class="line">13</span><br><span class="line">14</span><br><span class="line">15</span><br><span class="line">16</span><br><span class="line">17</span><br><span class="line">18</span><br><span class="line">19</span><br><span class="line">20</span><br><span class="line">21</span><br><span class="line">22</span><br><span class="line">23</span><br><span class="line">24</span><br><span class="line">25</span><br><span class="line">26</span><br><span 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class="line">179</span><br><span class="line">180</span><br><span class="line">181</span><br><span class="line">182</span><br><span class="line">183</span><br><span class="line">184</span><br><span class="line">185</span><br><span class="line">186</span><br><span class="line">187</span><br><span class="line">188</span><br></pre></td><td class="code"><pre><span class="line"><span class="comment">/**</span></span><br><span class="line"><span class="comment"> *</span></span><br><span class="line"><span class="comment"> *  <span class="doctag">@classDesc </span>核心js基类,提供全局可用api</span></span><br><span class="line"><span class="comment"> *  <span class="doctag">@namespace <span class="variable">ZA</span></span></span></span><br><span class="line"><span class="comment"> */</span></span><br><span class="line"></span><br><span class="line"><span class="keyword">const</span> Za = &#123;</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 转换为字符</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param </span>v &#123;object&#125;</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;string&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  toString: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="built_in">Object</span>.prototype.toString.apply(v);</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 判断值是否已定义</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param </span>v &#123;*&#125;</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isDefined: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="keyword">typeof</span> v !== <span class="string">'undefined'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否为空</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param </span>v  &#123;*&#125; 值</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param </span>allowBlank &#123;boolean&#125; 是否允许空</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean|*&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isEmpty: <span class="function"><span class="keyword">function</span> (<span class="params">v, allowBlank</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> v === <span class="literal">null</span> || v === <span class="literal">undefined</span></span><br><span class="line">      || <span class="built_in">String</span>(v).toUpperCase() === <span class="string">'NULL'</span></span><br><span class="line">      || ((Za.isArray(v) &amp;&amp; !v.length))</span><br><span class="line">      || (!allowBlank ? v === <span class="string">''</span> : <span class="literal">false</span>)</span><br><span class="line">      || (Za.isObject(v) &amp;&amp; <span class="built_in">JSON</span>.stringify(v) === <span class="string">'&#123;&#125;'</span>)</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是数组</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isArray: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> Za.toString(v) === <span class="string">'[object Array]'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是日期</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isDate: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> Za.toString(v) === <span class="string">'[object Date]'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是对象</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isObject: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> !!v &amp;&amp; Za.toString(v) === <span class="string">'[object Object]'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 字符串是否是对象</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">str</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isJSON(str) &#123;</span><br><span class="line">    <span class="keyword">if</span> (<span class="keyword">typeof</span> str == <span class="string">'string'</span>) &#123;</span><br><span class="line">      <span class="keyword">try</span> &#123;</span><br><span class="line">        <span class="keyword">var</span> obj = <span class="built_in">JSON</span>.parse(str);</span><br><span class="line">        <span class="keyword">if</span> (<span class="keyword">typeof</span> obj == <span class="string">'object'</span> &amp;&amp; obj) &#123;</span><br><span class="line">          <span class="keyword">return</span> <span class="literal">true</span>;</span><br><span class="line">        &#125; <span class="keyword">else</span> &#123;</span><br><span class="line">          <span class="keyword">return</span> <span class="literal">false</span>;</span><br><span class="line">        &#125;</span><br><span class="line"></span><br><span class="line">      &#125; <span class="keyword">catch</span> (e) &#123;</span><br><span class="line">        <span class="keyword">return</span> <span class="literal">false</span>;</span><br><span class="line">      &#125;</span><br><span class="line">    &#125;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是函数</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isFunction: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> Za.toString(v) === <span class="string">'[object Function]'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是数值型</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isNumber: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="keyword">typeof</span> v === <span class="string">'number'</span> &amp;&amp; <span class="built_in">isFinite</span>(v);</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是字符型</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isString: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="keyword">typeof</span> v === <span class="string">'string'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是布尔型</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isBoolean: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="keyword">typeof</span> v === <span class="string">'boolean'</span>;</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是原始类型</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;*|boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isPrimitive: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> Za.isString(v) || Za.isNumber(v) || Za.isBoolean(v);</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 是否是URL</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">v</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;boolean&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  isUrl: <span class="function"><span class="keyword">function</span> (<span class="params">v</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="regexp">/(((^https?)|(^ftp)):\/\/((([\-\w]+\.)+\w&#123;2,3&#125;(\/[%\-\w]+(\.\w&#123;2,&#125;)?)*(([\w\-\.\?\\\/+@&amp;#;`~=%!]*)(\.\w&#123;2,&#125;)?)*)|(localhost|LOCALHOST|127.0.0.1))\/?)/i</span></span><br><span class="line">      .test(v);</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 返回parameters参数 特指页面跳转间传递的参数</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;*&#125;</span></span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  getParameters: <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    <span class="keyword">var</span> params = sessionStorage.getItem(<span class="string">"_parameters"</span>);</span><br><span class="line">    sessionStorage.removeItem(<span class="string">"_parameters"</span>);</span><br><span class="line">    <span class="comment">//params = Za.isEmpty(params) ? &#123;&#125; : params;</span></span><br><span class="line">    <span class="keyword">return</span> Za.JsonEval(params);</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 清空 页面间跳转的参数</span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  clearParameters: <span class="function"><span class="keyword">function</span> (<span class="params"></span>) </span>&#123;</span><br><span class="line">    sessionStorage.removeItem(<span class="string">"_parameters"</span>);</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * 查询当前日前几天的日期</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param </span>AddDayCount &#123;int&#125; 负数为前X天 正数为后X天</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;string&#125;</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@exaple</span></span></span><br><span class="line"><span class="comment">   *    Za.getDate(-6)</span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  getDate: <span class="function"><span class="keyword">function</span> (<span class="params">AddDayCount</span>) </span>&#123; <span class="comment">//日期查询</span></span><br><span class="line">    <span class="keyword">var</span> dd = <span class="keyword">new</span> <span class="built_in">Date</span>();</span><br><span class="line">    dd.setDate(dd.getDate() + AddDayCount + <span class="number">1</span>);</span><br><span class="line">    <span class="keyword">var</span> y = dd.getYear() + <span class="number">1900</span>;</span><br><span class="line">    <span class="keyword">var</span> m = (dd.getMonth() + <span class="number">1</span>) &lt; <span class="number">10</span> ? <span class="string">"0"</span> + (dd.getMonth() + <span class="number">1</span>) : (dd.getMonth() + <span class="number">1</span>);</span><br><span class="line">    <span class="keyword">var</span> d = dd.getDate() &lt; <span class="number">10</span> ? <span class="string">"0"</span> + dd.getDate() : dd.getDate();</span><br><span class="line">    <span class="keyword">return</span> y + <span class="string">"-"</span> + m + <span class="string">"-"</span> + d;</span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line"></span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * JSON对象转换为String</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">json</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@constructor</span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  JsonToStr: <span class="function"><span class="keyword">function</span> (<span class="params">json</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="built_in">JSON</span>.stringify(json);</span><br><span class="line">  &#125;,</span><br><span class="line">  <span class="comment">/**</span></span><br><span class="line"><span class="comment">   * String转换为JSON</span></span><br><span class="line"><span class="comment">   * <span class="doctag">@param <span class="variable">str</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@returns <span class="type">&#123;Object&#125;</span></span></span></span><br><span class="line"><span class="comment">   * <span class="doctag">@constructor</span></span></span><br><span class="line"><span class="comment">   */</span></span><br><span class="line">  JsonEval: <span class="function"><span class="keyword">function</span> (<span class="params">str</span>) </span>&#123;</span><br><span class="line">    <span class="keyword">return</span> <span class="built_in">eval</span>(<span class="string">"("</span> + str + <span class="string">")"</span>);</span><br><span class="line">    <span class="comment">//return JSON.parse(str);</span></span><br><span class="line">  &#125;,</span><br><span class="line"></span><br><span class="line">&#125;;</span><br><span class="line"></span><br><span class="line"><span class="keyword">export</span> <span class="keyword">default</span> Za</span><br></pre></td></tr></table></figure>


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